I asked one of the compiler guys, and he said the "SGI cross compilers"
are also made by Cygnus. He also said
This customer would need to know where in the executable
the symbols are read for XRAY and then see if that section
exists in the mips targeted executable.
In particular, some tools generate .symtab and/or .dynstr sections with
symbols, and other tools only read one or the other of those
sections. He though you were probably missing a .symtab section in your
object.